ChartDirector 7.0 (ASP/COM/VB Edition)

Custom Scatter Symbols




This example demonstrates using external image files as scatter symbols.

The chart in this example is created as 5 scatter layers using XYChart.addScatterLayer, with each layer containing one point.

The symbols for the scatter layers come from external image files. They are loaded using DataSet.setDataSymbol2.

Source Code Listing

[Web Version (in ASP)] aspdemo\scattersymbols.asp
<%@ language="vbscript" %> <% Set cd = CreateObject("ChartDirector.API") ' The XY points for the scatter chart dataX = Array(200, 400, 300, 250, 500) dataY = Array(40, 100, 50, 150, 250) ' The custom symbols for the points symbols = Array("robot1.png", "robot2.png", "robot3.png", "robot4.png", "robot5.png") ' Create a XYChart object of size 450 x 400 pixels Set c = cd.XYChart(450, 400) ' Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border (0xc0c0c0). ' Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0) Call c.setPlotArea(55, 40, 350, 300, -1, -1, &Hc0c0c0, &Hc0c0c0, -1) ' Add a title to the chart using 18pt Times Bold Itatic font. Call c.addTitle("Battle Robots", "Times New Roman Bold Italic", 18) ' Add a title to the y axis using 12pt Arial Bold Italic font Call c.yAxis().setTitle("Speed (km/s)", "Arial Bold Italic", 12) ' Add a title to the y axis using 12pt Arial Bold Italic font Call c.xAxis().setTitle("Range (km)", "Arial Bold Italic", 12) ' Set the axes line width to 3 pixels Call c.xAxis().setWidth(3) Call c.yAxis().setWidth(3) ' Add each point of the data as a separate scatter layer, so that they can have a different symbol For i = 0 To UBound(dataX) Call c.addScatterLayer(Array(dataX(i)), Array(dataY(i))).getDataSet(0).setDataSymbol2( _ Server.MapPath(symbols(i))) Next ' Output the chart Set viewer = cd.WebChartViewer(Request, "chart1") Call viewer.setChart(c, cd.SVG) ' Include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("", "", "title='Range = {x} km, Speed = {value} km/s'") %> <!DOCTYPE html> <html> <head> <title>Custom Scatter Symbols</title> <!-- Include ChartDirector Javascript Library to support chart interactions --> <script type="text/javascript" src="cdjcv.js"></script> </head> <body style="margin:5px 0px 0px 5px"> <div style="font:bold 18pt verdana;"> Custom Scatter Symbols </div> <hr style="border:solid 1px #000080; background:#000080" /> <div style="font:10pt verdana; margin-bottom:1.5em"> <a href="viewsource.asp?file=<%= Request("SCRIPT_NAME") %>">View Chart Source Code</a> </div> <!-- ****** Here is the chart image ****** --> <%= viewer.renderHTML() %> </body> </html>

[Windows Version (in Visual Basic)] vbdemo\scattersymbols.cls
Public Sub createChart(viewer As Object, chartIndex As Integer) Dim cd As New ChartDirector.API ' The XY points for the scatter chart Dim dataX() dataX = Array(200, 400, 300, 250, 500) Dim dataY() dataY = Array(40, 100, 50, 150, 250) ' The custom symbols for the points Dim symbols() symbols = Array("robot1.png", "robot2.png", "robot3.png", "robot4.png", "robot5.png") ' Create a XYChart object of size 450 x 400 pixels Dim c As XYChart Set c = cd.XYChart(450, 400) ' Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border ' (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0) Call c.setPlotArea(55, 40, 350, 300, -1, -1, &Hc0c0c0, &Hc0c0c0, -1) ' Add a title to the chart using 18pt Times Bold Itatic font. Call c.addTitle("Battle Robots", "timesbi.ttf", 18) ' Add a title to the y axis using 12pt Arial Bold Italic font Call c.yAxis().setTitle("Speed (km/s)", "arialbi.ttf", 12) ' Add a title to the y axis using 12pt Arial Bold Italic font Call c.xAxis().setTitle("Range (km)", "arialbi.ttf", 12) ' Set the axes line width to 3 pixels Call c.xAxis().setWidth(3) Call c.yAxis().setWidth(3) ' Add each point of the data as a separate scatter layer, so that they can have a different ' symbol Dim i As Long For i = 0 To UBound(dataX) Call c.addScatterLayer(Array(dataX(i)), Array(dataY(i))).getDataSet(0).setDataSymbol2( _ symbols(i)) Next ' Output the chart Set viewer.Picture = c.makePicture() 'include tool tip for the chart viewer.ImageMap = c.getHTMLImageMap("clickable", "", _ "title='Range = {x} km, Speed = {value} km/s'") End Sub